JSFiddle - React, Tailwind, and code Playground

HTML

<form>
<input type="text" name="user" onkeypress="detect_enter_keyboard(event)">
<input name="btnLogin" onclick="test_fn();" type="button" value="Send">
</form>

<script>
function detect_enter_keyboard(event) {
    var key_board_keycode = event.which || event.keyCode;
    if(key_board_keycode == 13)
    {
        test_fn();
    }
}
</script>

<script>
function test_fn(){
alert("555555");
}
</script>